678777088 has 108 divisors (see below), whose sum is σ = 1578100860. Its totient is φ = 290160640.

The previous prime is 678777061. The next prime is 678777131. The reversal of 678777088 is 880777876.

It can be written as a sum of positive squares in 2 ways, for example, as 539725824 + 139051264 = 23232^2 + 11792^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525948 + ... + 527236.

It is an arithmetic number, because the mean of its divisors is an integer number (14612045).

Almost surely, 2^678777088 is an apocalyptic number.

678777088 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678777088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789050430).

678777088 is an abundant number, since it is smaller than the sum of its proper divisors (899323772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678777088 is a wasteful number, since it uses less digits than its factorization.

678777088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1319 counting only the distinct ones).

The product of its (nonzero) digits is 7375872, while the sum is 58.

The square root of 678777088 is about 26053.3508017683. The cubic root of 678777088 is about 878.8384675408.

The spelling of 678777088 in words is "six hundred seventy-eight million, seven hundred seventy-seven thousand, eighty-eight".